>1:1 scale reproduction cockpit where the windows have been replaced by monitors and it is all gyracopically synced to the simulator program. That's my setup. A keyboard is pretty basic though. If you want to adjust flaps, turn off parking brakes, simple things like that would be much more difficult without the extra inputs. Of course you don't have to do any of that stuff, but it isn't really a sim if you're automating those functions.